Solving for Specified Variable

D=1/2GR Solving for G

What i do not understand is why do you multiply each side by 2? Is it because that is the denominator? Also, when you do this it comes out to 2D/R=1G, so because its 1G then its just G correct? So the answer is 2D/R=G?

Now lets say the problem was different.
D=3/4GR Would it be
(4)D=4(3/4)GR
4D=3G (move the r to the other side)
4D/R=3G Would that be correct? Im new to this stuff so just trying to understand how it works, would that 3 be correct beside the G? Doesn`t seem right.

What i do not understand is why do you multiply each side by 2? Is it because that is the denominator? Also, when you do this it comes out to 2D/R=1G, so because its 1G then its just G correct? So the answer is 2D/R=G?

Now lets say the problem was different.
D=3/4GR Would it be
(4)D=4(3/4)GR
4D=3G (move the r to the other side)
4D/R=3G Would that be correct? Im new to this stuff so just trying to understand how it works, would that 3 be correct beside the G? Doesn`t seem right.

Everything you are asking about is correct except for that you aren't done with your last equation.
4D/R =3G